The patent's assignee for patent application serial number 698692 is Koninklijke Philips Electronics N.v.
News editors obtained the following quote from the background information supplied by the inventors: "It is known to implement beam shaping based on the alignment orientation of liquid crystal molecules in a liquid crystal cell. This alignment can be controlled by applying an electric field thereto. The reorientation of the liquid crystal molecules results in a refractive index gradient, which leads to a light ray passing through the liquid crystal cell being redirected. Thereby, the direction and/or shape of a light beam can be controlled electrically.
"Autostereoscopic display devices include a display panel having an array of display pixels for producing a display and an imaging arrangement for directing different views to different spatial positions in front of the display. It is well known to use an array of elongate lenticular elements which are provided extending parallel to one another and overlying the display pixel array as the imaging arrangement, and the display pixels are observed through these lenticular elements. Such displays are examples of multiview displays.
"In an arrangement in which, for example, each lenticule is associated with two columns of display pixels, the display pixels in each column provide a vertical slice of a respective two dimensional sub-image. The lenticular sheet directs these two slices and corresponding slices from the display pixel columns associated with the other lenticules, to the left and right eyes of a user positioned in front of the sheet, so that the user observes a single stereoscopic image. The sheet of lenticular elements thus provides a light output directing function.
"In other arrangements, each lenticule is associated with a group of four or more adjacent display pixels in the row direction. Corresponding columns of display pixels in each group are arranged appropriately to provide a vertical slice from a respective two dimensional sub-image. As a user's head is moved from left to right, a series of successive, different, stereoscopic views are perceived creating, for example, a look-around impression.
"The above described device provides an effective three dimensional display. However, it will be appreciated that, in order to provide stereoscopic views, there is a necessary sacrifice in the horizontal resolution of the device. This sacrifice in resolution is unacceptable for certain applications, such as the display of small text characters for viewing from short distances. For this reason, it has been proposed to provide a display device that is switchable between a two-dimensional mode (singleview mode) and a three-dimensional (stereoscopic) mode (multiview mode).
"One way to implement this is to provide an electrically switchable lenticular array. In the two-dimensional mode, the lenticular elements of the switchable device operate in a 'pass through' mode, i.e. they act in the same way as would a planar sheet of optically transparent material. The resulting display has a high resolution, equal to the native resolution of the display panel, which is suitable for the display of small text characters from short viewing distances. The two-dimensional display mode cannot, of course, provide a stereoscopic image.
Most Popular Stories
- SpaceX's Satellite Launch Is 'Game-Changer'
- Reid Confident Congress to Pass Immigration Bill
- Maui Visitor Killed in Shark Attack
- Donors Abandon GOP Over Gun Stance
- Mexico: 'Extremely Dangerous' Radioactive Material Stolen
- CEOs More Optimistic About Economy, Hiring
- Climate Change Early Warning System Urged
- Private Sector Employment Surges by 215,000 Jobs
- Newtown 911 Tapes Being Released Today
- Calif. Likes Christie, Says Tea Party's a Drag